Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already establish readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds value beyond that by previewing the returned payload (status values, per-item production status, tracking ids), which compensates for the missing output schema. It does not mention error behavior for unknown order ids or any auth requirements.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded with the resource and the returned data, then the sandbox condition, then the endpoint path. Dense but every clause carries information; the trailing 'GET /order/status/{order_id}' is modestly redundant padding but useful for callers reasoning about the underlying API.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the enumeration of returned fields is precisely what an agent needs to decide this tool answers a status query, and the sandbox flag is explained. Remaining gaps (not-found/error behavior, auth) are minor for a two-parameter read-only lookup.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and both parameters are documented in the schema, so the baseline is 3. The description merely restates the sandbox behavior already described in the schema and emphasizes 'YOUR order id', adding little syntax or format detail beyond the structured fields.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource ('Status of an order by YOUR order id') and enumerates exactly what is returned: order status enum values, per-item production status, shipments with tracking ids, totals, ship-to address. That scope clearly separates it from the sibling write tools (create_order, cancel_order) and catalog lookups.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives real usage context: the lookup key must be 'YOUR order id' (the CustomCat-issued id), and 'Set sandbox=true to look up a sandbox test order' distinguishes test from live lookups. It stops short of explicit when-not/alternative routing against siblings such as customcat_cancel_order or create_order, so it is clear context without exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.